Abstract

A relative transmission attachment is described for automatically recording spectra from 210 to 2700 mμ using a Beckman Model DU quartz spectrophotometer. The attachment requires the use of only one rotating mirror, detector, amplifier, and commutator along with two tuned rectifiers. The ratio of sample to reference beam intensities is traced on a high speed recorder. A slit servo operated from the reference signal maintains a reasonably constant reference signal. Representative curves showing the performance of the instrument are reproduced. The applications of differential recording are discussed.

© 1952 Optical Society of America

Modification of a Beckman Model DU Spectrophotometer for Automatic Operation at 210–2700 mμ

Wilbur Kaye, Cham Canon, and R. G. Devaney
J. Opt. Soc. Am. 41(10) 658-664 (1951)

An Attachment to Permit the Examination of Liquid Films by a Beckman Model DU Spectrophotometer

H. G. McAdie and R. V. V. Nicholls
J. Opt. Soc. Am. 43(9) 767-768 (1953)

Minimizing Anomalies in Reflectance Measurements with the Beckman Quartz Spectrophotometer

H. K. Hammond and I. Nimeroff
J. Opt. Soc. Am. 42(6) 367-372 (1952)

Modification of the Beckman Model DU Spectrophotometer for the Measurement of Interference Filters*

Hubert S. Moran
J. Opt. Soc. Am. 45(1) 26-27 (1955)

Transmission Measurements with the Beckman Quartz Spectrophotometer

Kasson S. Gibson and Margaret M. Balcom
J. Opt. Soc. Am. 37(8) 593-608 (1947)